Add README markdown file.
Add README markdown file.

nobeans/gvm-cli,dsyer/gvm,skpal/sdkman-cli,GsusRecovery/sdkman-cli,DealerDotCom/gvm-cli,sdkman/sdkman-cli,nobeans/gvm-cli,gvmtool/gvm-cli,busches/gvm-cli,jbovet/gvm,GsusRecovery/sdkman-cli,dsyer/gvm,shanman190/sdkman-cli,skpal/sdkman-cli,DealerDotCom/gvm-cli